The film star drowned at age 43 in the waters off Southern California’s Catalina Island over the Thanksgiving weekend in 1981. She had been yachting with her husband, actor Robert Wagner, and then co-star, actor Christopher Walken at the time of her death.

“We know on that fateful night there was a violent confrontation,” claims Howard in the video above. “But what actually took place that led Natalie to leave the boat?”

Watch part one of this two-part episode Thursday as Dylan Howard joins Natalie’s sister, Lana Wood, on the

Dr. Phil stage. Then on Friday, learn what a key witness who was present on the Yacht the night Natalie Wood drowned told police in 1981, and what he now claims he heard in the hours before the actress was discovered missing.